Transmutation (Polymorph)
Level: Animal 7, Druid 8, Moon 8, Scalykind 8
Components: V, S, DF
Casting Time: 1 standard action
Range: Close (25 ft. + 5 ft./2 levels)
Target: Up to one willing creature per level, all within 30 ft. of each other
Duration: 1 hour/level (D)
Saving Throw: None; see text
Spell Resistance: Yes (harmless)
You transform up to one willing creature per caster level into an animal of your choice; the spell has no effect on unwilling creatures. Use the alternate form special ability to determine each target’s new abilities, rather than the polymorph subschool. The maximum Hit Dice of an assumed form is equal to the subject’s HD or your caster level, whichever is lower, to a maximum of 20 HD at 20th level.
Recipients remain in the assumed form until the spell ends or until you dismiss it for all recipients. An individual recipient can resume its natural form as a full-round action. Doing so ends the spell only for that recipient.
Source: Player’s Handbook (Page 198)